The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 04, 2001
Filed:
Feb. 23, 2000
Applicant:
Inventors:
Masami Niimi, Handa, JP;
Akifumi Hosoya, Kariya, JP;
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01R 3/938 ;
U.S. Cl.
CPC ...
H01R 3/938 ;
Abstract
A DC motor includes an armature, an armature shaft, a commutator, a plurality of brushes in contact with the commutator, a plurality of brush springs for respectively biasing the brushes against the commutator, and a brush holder unit for holding the pair of brushes. Each of the brush springs comprises a springy spring body disposed at a side of corresponding one of the brushes and a spring arm extending from the spring body to bias the rear end of the corresponding one of the brushes against the commutator, and the spring body has an outer periphery disposed within the axial length of the corresponding one of the brushes.